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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Electrical >> Gauges >> Meter >> Meter / Gauge System >> System Description

System Description

  1. METER GAUGE AND WARNING/INDICATOR 
    Fig 1: Identifying Meter Gauge And Warning Indicator
    G05765391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Meter/Gauge 

    ITEM SPECIFICATION

    Item Details
    Speedometer Based on a signal received from the wheel speed sensor, the skid control ECU calculates the vehicle speed and transmits data to the combination meter (CAN)
    Tachometer The combination meter receives an engine speed signal from the ECM and the gauge needle operates (CAN)
    ODO/TRIP meter
    • The combination meter receives a vehicle speed pulse integration signal from the skid control ECU and the ODO/TRIP meter display operates (CAN)
    • Using the ODO/TRIP switch, the ODO/TRIP meter display changes
    Fuel receiver gauge The combination meter receives fuel amount information measured by the fuel sender gauge and the gauge needle operates (Direct line)
    Engine coolant temperature receiver gauge The combination meter receives an engine coolant temperature signal from the ECM and the gauge needle operates (CAN)
    Oil pressure receiver gauge The combination meter receives an engine speed signal from the ECM (CAN) and receives an oil pressure sender signal from the oil pressure sender (Direct line) Then the meter measures signals and the gauge needle operates.
    Voltage meter Monitors IG voltage and the gauge needle operates (Direct line)

    Warning/Indicator 

    INDICATOR WARNING CHART

    Item Details
    BEAM indicator light
     
    Receives signals from the main body ECU (CAN)
    FRONT FOG indicator light
     
    The indicator turns on when a FRONT FOG illumination command signal is received (CAN)
    A/T P warning light
    A/T P
    Receives a shift position P signal and transfer neutral signal, and activates the warning light (CAN)
    SRS warning light
     
    Receives malfunction signals from the center airbag sensor (CAN).
    DOOR indicator light
     
    The open door indicator comes on when a signal is received from the main body ECU (CAN).
    Driver side seat belt warning light
     
    Receives driver seat belt signals (unfastened) from the main body ECU (CAN)
    Brake warning light(1)
    BRAKE
    • Comes on when the parking brake switch is on (CAN)
    • Comes on when the brake fluid level warning switch is on (Direct line)
    • Comes on when the vehicle stability control system is malfunctioning
    Brake warning light(2)
     
    CHARGE warning light
     
    Receives malfunction signals from the generator (Direct line)
    4LO indicator light
    4LO
    Receives 4LO indicator light signals from the four wheel drive control ECU (CAN)
    ABS warning light(1)
    ABS
    Receives malfunction signals from the skid control ECU (CAN)
    ABS warning light(2)
     
    MIL(1)
     
    Receives malfunction signals from the ECM (Direct line)
    MIL(2)
     
    SECURITY warning light
     
    Receives SECURITY warning light signals from the certification ECU (smart key ECU assembly) (Direct line)
    CLEARANCE SONAR indicator light(3)
     
    Receives CLEARANCE SONAR indicator signals from the parking assist ECU (CAN)
    ACCESS MODE indicator light
     
    Receives ACCESS MODE indicator signals from the suspension control ECU (CAN)
    AFS OFF indicator light
     
    Receives AFS OFF indicator signals from the headlight swivel ECU assembly (CAN)
    FUEL warning light
     
    Receives fuel empty signals from the fuel sender gauge (Direct line)
    SLIP indicator light
     
    Receives malfunction signals from the skid control ECU (CAN)
    CRUISE main indicator light
    CRUISE
    Receives a CRUISE on signal or malfunction signal from the ECM (CAN)
    HEAD indicator light(1)
     
    Receives a taillight or headlight signal from the main body ECU (CAN)
    TAIL indicator light(2)
     
    Receives a taillight or headlight signal from the main body ECU (CAN)
    Turn signal indicator light (LH/RH)
     
    Receives a turn signal from the FLASHER relay (Direct line)
    RSCA OFF indicator light
    RSCA OFF
    Receives an RSCA OFF signal from the center airbag sensor (Direct line)
    Tire pressure warning light
     
    Receives a low tire pressure signal from the tire pressure warning ECU (CAN)
    Master warning light
     
    Receives warning signals from sensors and ECUs (Direct line and CAN)
    CRAWL indicator light
     
    Receives a CRAWL switch ON signal from the skid control ECU (CAN)
    ECT PWR indicator light
    ECT PWR
    Receives an ECT PWR switch ON signal from the ECM (CAN)
    2nd START indicator light
    2nd STRT
    Receives a 2nd START switch ON signal from the ECM (CAN)
    Center differential lock indicator light
     
    Receives a center differential lock switch ON signal from the four wheel drive control ECU (CAN)
    PCS indicator light(4)
    PCS
    Receives a PCS indicator light signal from the seat belt control ECU (CAN)
    A/T P shift position indicator Receives a P signal from the ECM (CAN)
    A/T R shift position indicator Receives an R signal from the ECM (CAN)
    A/T N shift position indicator Receives an N signal from the ECM (CAN)
    A/T D shift position indicator Receives a D signal from the ECM (CAN)
    A/T S (1 to 6) shift position indicator Receives a signal (1 to 6) from the ECM (CAN).
    (1) for U.S.A.

    (2) except U.S.A.

    (3) w/ Intuitive Parking Assist System

    (4) w/ Pre-Collision System
  2. MULTI-INFORMATION DISPLAY 
    1. Cruise information display:

      The cruise information is displayed in the following order each time the DISP switch is pressed.

      Fig 2: Multi-Information Display - Cruise Information
      G05765392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      DISPLAY CHART

      Display Outline
      CURRENT Receives vehicle speed pulse signals (CAN) and fuel consumption data, and measures the instant fuel consumption.
      OUTSIDE TEMP Receives an outside temperature condition signal via CAN communication and displays through the multi-display
      AFTER REFUELING Receives vehicle speed pulse signals (CAN) and fuel consumption data, and measures the average fuel consumption from the time the vehicle was refueled
      CRUISING RANGE
      • Calculates the estimated distance to empty
      • The distance is calculated using the fuel gauge value and long-term learned fuel consumption value
      AFTER START (Average speed) Receives vehicle speed pulse signals (via the direct line and CAN) and fuel consumption data, and measures the average vehicle speed from the time the engine was started
      AFTER START (Travel distance) Receives vehicle speed pulse signals (CAN) and fuel consumption data, and measures the distance driven from the time the engine was started
      Tire Pressure Reset Proceeding Receives a tire pressure condition signal via CAN communication, and displays through the multi-display
    2. Basic Flowchart.
      Fig 3: Cruise Information - Basic Flowchart
      G05765393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Multi-information display:

      When a warning is necessary, the warning display interrupts the multi-information display.

      The master warning light may illuminate or blink and a buzzer may sound depending on the item in the multi-information display.

    Fig 4: Multi-Information Display - (Warning Display)
    G05765394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002